def round_sum(a, b, c):
  if a % 10 < 5:
   a = a - a%10
  if b % 10 < 5:
   b = b - b %10
  if c % 10 < 5:
   c = c - c% 10
  if a % 10 >=5:
   a = a + (10-a%10)
  if b % 10 >=5:
   b = b + (10-b%10)
  if c % 10 >=5:
   c =c +(10-c%10)
    return a+b+c